Meter



June 22, 1937. E. H. BRAYER 2,084,317

METER 4 Sheets-Sheet 1 Filed May 2, 1934 33 a 22 1 1 I i 1 I l ll l l 1 l n I I I I l I l I. I l 25 F;

MAGNETIC 9/ CLUTCH June 22,

E. H. BRAYER Filed May 2, 1934 METER 4 Sheets-Sheet 2 June 22, 1937. E. H. BRAYER 2,084,317

METER Filed May 2, 1934 4 Sheets-Sheet 3 INVENTQR an 10%: Q940 ATTORNEYS June 22, 1937.

E. H. BRAYER METER Filed May 2,

1.934 4 Sheets-Sheet 4 w 0. FM 1 INVENTOR Patented June 22, 11937 UNITED STATES PATENT OFFICE METER Application May 2, 1934, Serial No. 723,536 14 Claims. (01. 221-101) This invention relates to a' meter and more particularly to a liquid metering system in which the operator sets the mechanism to deliver a deflnite quantity of liquid and in which, after this quantity of liquid has been delivered, the mechanism automatically stops the flow and resets itself to its original position. The meter shown is .primarily designed for use in mixing hot asphalt compounds which has heretofore been done by a bucket and scale, the bucket being filled, weighed and discharged. This operation was extremely hazardous to the operator, required a great deal of manual labor and was not accurate, all of which objections are eliminated by the present invention.

The invention, however, is not to be limited to the particular field mentioned but has a wide range of uses, for example, in gasoline and 0" service stations where it would enable the operator to take care of a number of pumps since after the operator sets the pump'to the desired gallonage, the delivery of the fuel or oil and the resetting of the mechanism is automatic. Further, the invention could be readily adapted to self-service gasoline or oil pumps by the addition of a coin-controlled mechanism whereby a retail user could insert, say, fifty cents, and receive exactly the quantity of gasoline or oil to which he is entitled. The invention also has ,a wide range of other uses, such as in filling containers with a definite volume of liquid and by the addition of further well known automatic mechanism, such as photoelectric cells or timing mechanisms could be adapted to continuously fill containers on a moving belt with definite volumes of liquid. The invention can also be employed in connection with the blending of oils, gasolines, kerosenes, lubricants and other commodities. in a fluid state, blending being readily accomplished -by having one or more systems made in accordance with the invention and delivering to a common discharge. The principal object of the provide a simple, reliable and accurate liquid 45 meter which includes a preselector hand which can be set to any desired volume indication and which also includes means for automatically stopping the flow oi liquid when the exact volume of fluid indicated by the preselector hand has 50 been delivered and means for automatically resetting the meter indicating mechanism to zeroafter the preselected volume has been delivered. Another object of the present invention is to provide a suitable clutch, whereby the metering 5'5 operation does not involve the unnecessary opvention is to eration of auxiliary equipmenhwhich operation might result in inaccuracy and another clutch whereby the'main indicating hand can be reset without operating itsmetering mechanism.

A further aim of the present invention is to provide such a system in which parts of stand ard construction, such as the meter, the valve and the valve thruster, can be employed, thereby enabling the system to beinstalled at relatively low cost.

Another object of the invention is to provide an automatic metering system of the character described which is compact in construction and is composed of relatively few moving parts and will operate eiilc'iently to deliver accurately predetermined quantities of liquid for a long period of time without getting out of order and requiring repairs. 1 T

Another object of the invention is to provide such a metering system which is conveniently adjustable throughout and in which, in particular, theelectrical contacts can be readily adjusted to obtain the most accurate measurement.

Another object of the present invention is to i provide such a metering device which can be adapted to any of the uses previously mentioned and in particular to use in mixing hot asphalt compounds or the like in which the meter and valve mechanisms must be steam jacketed to insure uniformity and accuracy in the measurement.

Another object is to provide a system which can be operated from any suitable current source and in which the speed oi the resetting mechanism can be conveniently adjusted to that desired.

In the accomp nyi z drawings:

Fig. 1 is a front elevation of a meter embodying myinvention showing a dial which is calibrated in, say, gallons having a standard indicating hand and also a preselector hand, the preselector hand being set to the volume. desired to be measured out.

Fig. 2 is a wiring diagram of the electric power and control system.

Fig. 3 is a vertical central section. through th metering mechanism shown in Fig. 1, parts beins shown in elevation.

Fig. 4 is a vertical transverse section taken on line 4-4, Fig. 3. a

Fig. 5 is a vertical transverse fragmentary section taken on line Fig. 3. v

Fig. 6 is a vertical fragmentary longitudinal section taken on line 6-6, Fig. I. Rigs. '7, 8, and 9 are fragmentary transverse sections taken on the correspondingly numbered V lines of Fig. 6.

Fig. 10 is a horizontal fragmentary central section showing a modifled form of the electrical means for setting and resetting the mechanism.

Fig. 11 is a side view of the mechanism shown in Fig. lOQshowing the preselector rod in section.

Fig. 12 is a fragmentary transverse section through a one-way drive which can be used in place of the magnetic clutch shown in the preferred form of the invention.

Fig. 12.

Fig. 14 is a fragmentaryvertical section similar to the section taken along line 9-9, Fig. 6, but showing a modifledform of preselector mechanism.

Fig. 15 is a view similar to Fig. 14 showing another position of the parts.

Fig. 16 is a section taken along line l6-l6, Fig. 14.

. The invention proposes the use of a meter of any suitable construction for the material handied and the meter 20 shown in the drawings is of the standard nutating disk type, the liquid material flowing through an inlet ll of the meter casing 22 'past' the nutating disk 24 and out through an=outlet it from which the materials are conveyed to the place desired. The nutating disk 24 nutates inaccordance with the quantity of liquid passing and a stem lt-thereon turns a disk 28, the stem 21 projecting through a slot in the disk It for this purpose. This disk "is fast to a vertical shaft 28 which, through suitwhich is loose on a horizontal indicator shaft 30 and drives this shaft through a friction clutch l'l, yielding pressure being exerted against this friction clutch by a spring 3!. This shaft is mountedat one end in a bearing formed in a bracket it and is arranged within a casing 40. At its other end this shaft 30 projects through the face of a dial ll, this dialhaving an annular series of numbers which are shown as graduated from1to20andareassumedtoindicategallcns.' The-dial ll issuitably mounted withinanannu- 1 lar-rim l2 and this rim-is screwed or otherwisesuitablysecuredinacircularopeninglnthe corresponding end wall of the casing ll. The annular rimdl also carries and the shaft it extendsthroughacentralopeningin the crystal l3 and at its outwardly projecting end preferably carries aknurled knob 44 by means of whichtheshaftflcanbeturnedbyhandinthe event of the failure of the motor to return the same as hereinafter described. The shaft I.

carriesanindicatorhandllthishandbeing.

' the flow of fluid to the meter or controlling the flow of fluid from the meter. The balanced valve 41 can be of any usual construction and as shown comprises a housing 48 whichis shown as secured to the supply pipe 46 and to the inlet 1| of the meter 20 and this housing can, of course, be steam jacketed where extremely viscous materials are being handled and it is necessary to keep them heated, under which conditions all of the piping would also be jacketed. The valve casing 48 is shown as having the usual stuiflng box it through which the valve stem 5. slides vertically. This valve stem carries a pair of heads Ii and 52 which open and close a pair of ports in an internal diaphragm 53 which extends across the interior of the valve housing. Suitable guides are provided. for each of the valve heads and by the provision of the two valve heads, as shown, the valve is balanced that is, there is no' tendency for the pressure of the fluid to either open or closethe valve inasmuch as the force of this pressure is balanced by its opposing effect upon the two valve heads. The valve is opened and closed by means of a motor driven thruster indicated generally at 55, this thruster being of conventional construction and hence not being illustrated in detail. When the motor of the thruster is energized, upward motion is imparted to a pair of push rods 51', these rods being connectedbyacrosbarll. Thiscrossbarissecured to one end of a lever It, the other end of this lever being pivoted, as indicated at 60, to the upper end of a link II, this link being in turn pivoted to a stationary bracket 62 mounted on the valve housing 48. Intermediate its ends the lever 59 is pivotally secured, as indicated at I, to the upper end of the valve rod I. 'Ihe valve is normally held closed by atension spring 64 which is connected at one end to the outer end of the lever 59 and at its other end is secured to the bracket '2. It is therefore apparent that when the motor of the thruster is energized the lever 58 will be lifted and the balanced valve openedsoastoadmitfluidunderpressure through the meter. Conversely, when the thruster motor is deenergized the spring M will draw the lever 58 downwardly thereby closing the valve and also returning the thrusher to its normal' inoperative condition.

Means are provided for preselecting the volume of fluid to be delivered by the meter and for this purpose a preselector hand II is provided which traverses thedialll andissettotheamount which it is desired to have the meter deliver. For thisp v mthepreselectorhand llisfastto a hub ll whichis'journalledin the dial 4| andis loose upon the indicator shaft 36. Formed integrally with the-hub ll isa worm wheel II, this worm wheel being driven by a worm ll fast upon a horizontal Nt-whichia'suitably journalled in the casing ll. This shaft ll extends through the side ofthe casing and is provided exteriorly of the casing with a knob II by means of which the preselector shaft is turned grxthepreselectorhand'lttothevolume de- Mounted on' the hub ll of the preselector -mechanismisacollar10 which'carries adisk'll of insulating material, this a' preselector switch II comprising astationary contact II and a movable contact I, the movable contactll being engagedby aca'm '2 which is'fast totheindicating shaftflsothatastheindieating shaft turns a partial revolution, it opens and closes the circuit between the movable and stationary contacts II and II. In the normal condition of the parts these preselectmcontacts and ii are normally closed as indicated in the wiring diagram, Fig. 2.

Also actuated by the cam 42 is a fixed zero limit switch I! comprising a pair of contacts and 86, the stationary contact I! being mounted on a disk 81 of insulating material and the movable contact 86 also being mounted on this disk. The disk is carried by a sleeve 88' through which the indicator shaft 2 extends and this sleeve 88 in turn is carried by a bracket or standard 8! secured to the bottom of the casing 40. The movable and stationary contacts III and ll are normally closed, as shown in Fig. 9, and when the salient part of the cam 82 engages the movable contact it opens the circuit associated with these contacts. It is therefore apparent that when the salient part of the cam 82 engages either .the movable contact II or the movable contact 26, it opens the corresponding circuit but since in the zero position of the indicator hand 45 the salient portion of the cam is in en-- gagement with the movable contact 86, this contact is normally open whereas the other is normally closed except when the preselector hand I0 is also set to a zero position.

Means are provided for automatically returning the indicator hand 45 to a zero position after the preselected volume of fluid has been delivered. Thus, the indicator hand 45 will travel clockwise registering the volume being discharged by the meter until it registers with the preselector hand III. When this occurs, as hereinafter discussed, the flow is cut off and, in the forms of the invention shown in Figs. 1-9, the indicator hand 45 is returned back to zero in a counter-clockwise direction by a small electric return motor 90, this motor being normally disengaged from the indicator shaft 38 through a magnetic clutch indi- 'cated generally at SI. within the casing 40 and through the usual gearing drives a shaft 92 which is connected to the driving member 92 of the magnetic clutch OI. This driving member 93 has an annular slot 94 in which a coil 95 is wound, this driving member 93 forming the core of the magnetic clutch. The driving member 93 is provided with a bore in which a pin 96 is slidably mounted and normally urged outwardly by a small compression spring '91. This pin carries the driven member 28 of the magnetic clutch, this being in the form of an iron or steel disk forming the armature of the magnetic clutch. The armature 98 and the pin 86 are free to rotate with respect to the driving member or core 92 of the clutch. The annature 98 carries two pairs of pins 99 which embrace a pair of transverse pins Ilil in a collar iii in the inner end of the indicator shaft 38.

. Any suitable means can be provided for energizing the clutch and as shown the core 92 carries a ring I02 of insulating material, this ring in turn carrying a pair of collector rings I02 and'ill. these rings being respectively connected to the opposite ends of the winding 85 of the core and being engaged by a pair of stationary brushes I05 and III mounted in a brush holder IIII.

As hereinafter described the motor 90 and the magnetic clutch 9| are simultaneously energized so that the motor through the magnetic clutch 8i will drive the indicator shaft 2 counterclockwise andt'nereby return the indicator hand 45 to zero. When the indicator hand reaches its zero position additional means are provided for deenergizing the motor II and the magnetic clutch Referring now to the wiring diagram shown,

The motor is mounted in Fig. 2, the numerals III! and III represent the power lines through which alternating current, at say volts, is supplied. From the power line III is a line II2 leading to a manual stop button II3 which in its normal or closed position makes contact with the line I I2 and the line II4. A start button H5 is also provided which, when depressed, closes the circuit between the line H4 and a line H6. The line H6 connects with the winding I Ilof a relay H9 and also with a winding I2li of a holding relay Hi. The other ends of the windings H8 and I20 are commoned and connected with a line I22, this line I22 connecting with the contact 80 of the preselector switch I8 which is normally closed. The other contact 8| of this preselector switch connects with the main line IIII.

When the relay 9 is energized its armature connects the windings of the thruster motor 56 with the opposite sides of the power lines III! and III, through the lines I23 and I24 which are connected with thruster motor terminals.

The holding relay IN is designed to continue the flow of current to the thruster motor after the startbutton H5 is released and for this purpose its armature, in the energized condition of the relay connects the line Iii with the line H4, and maintains the circuit across the released start button Iii.

When the thruster motor 56 is energized, raising the link 59, it opens a normally closed valve limit switch I25, this valve limit switch being closed when the control valve 41 is closed and opened when this valve is opened. This switch connects the winding I24 of a delay relay I", the other end of this winding being connected with the main power line II I. The armature of the delay relay I30, in the energized condition of the relay, clcses a circuit between the main power line III, a variable resistance ISI and a line I32 leading to one terminal of the indicator hand return motor 90, the other terminal of this motor being connected with the main power line III. The primary winding ill of a step-down transformer I34 is connected across the lines I22 and the main power line III and the secondary winding I35 of this transformer I34 provides low voltage current to a rectifier I26, this rectifier being preferably of the dry disk type and either of the half-wave or full-wave type. The outlet lines I21 and I" of the rectifier I" connect with the two brushes Ill and I" of the magnetic clutch iii. The purpose of the rectifier I 38 is, of course, to furnish direct current to the magnetic clutch 9 I Assuming that it is desired to have the meter deliver, say, 9 gallons of material the operator turns the preselector knob 15 to set the preselector hand III at the numeral 9 on the dial 4I. This is effected through the shaft I4 and worm and worm gear I2 and 12. The setting of the preselector hand 12 in this manner also sets the preselector contacts 80 and II inasmuch as these are mounted on the disk II which is carried directly by the hub II of the worm wheel I2. This preselector pointer, once set, only requires manual resetting if some other quantity is desired and need never be changed unless diflerent amounts are to be measured. Normally the indicator hand 4l,is at zero and in this condition the zero limit switch contacts II and I! are opened and when the preselector hand III is in any position other than zero the preselector contacts 80 and 8| are closed.

To start the mechanism the starting button III is depressed and this permits current to flow from the power line III through the holding relay I2I and the relay II! and thence through the line I22, closed contacts 88 and II of the preselector switch and back through the other side III of the main power line. The energization of the holding relay I2I closes the circuit across the starting switch II8 so that the circuit just described is maintained until broken by the opening of the contacts 88 and 8| of the preselector switch or the stop button H8. The energizatibn of the relay H8 causes current to flow from the side III of the power line through line I23, thruster motor 88 and line I 28 to the other side III of the main power line, thereby starting the thruster motor. The energization of the thruster motor causes its push rods 81 to move upwardly 28, through the vertical shaft 3| and the worm gearing 82 and 88 associated therewith, rotates the indicator shaft 88 which carries the cam 82. As soon as the cam 82 starts to rotate the contacts 88 and 88 of the zero limit switch close, no

' current, however, flowing because the valve limit switch I28 has opened.

The meter therefore continues to deliver material and the indicator shaft 88 of the meter turns a part revolution until the indicator hand comes into registry with the preselector hand I8.

Since the setting of the preselector hand 18 also sets the disk l'l carrying the preselector switch contacts 88 and 8I to a corresponding position, when the indicator hand 88 registers with the preselector hand 18, the cam 82 engages the preselector contact 8I and opens the switch.

This breaks the circuit through the holding relay I2I andtherelay II8 therebybreakingthe circuit through the thruster motor 88. When the thruster motor is deenergised the spring draws the lever 88 downwardly thereby closing the main valve 81 .and cutting oi! the further flow of liquid through the meter. At the same time the closing of'the main valve 81 closes the valve limit switch I28 and a circuit is established from the side III of theline through the-now closed contacts 88 and 88 of the aero limit switch, line I28, closed valve limit switch I28, line I21, delay relay winding I28totheside III ofthepowerline. The action of the delayrelay I88 provides alapse of, say. two and one-half seconds between the time of its initialenergimtionandthetimeinwhichits armature closes a circuit which permits current to ilow fromthe side III of the-main power line through the variable resistance, I8I, through the contactsofthedelayrelay m andthrough line- I82totbeindicatorhandreturnmotor88,the

other terminal of this motor being directly connected with the side III ofthe main power line. The variable resistance I8I is provided to vary thespeadofthereturnmotorflinreturning the indicatorhandlltoitsaeropoaitionandthepur pmedthedelayrelay lllistoprovidealapse in time before the indicator hand 85 starts its return movement so that all parts of the metering apparatus can return to their normal position before the indicator hand starts its return movement.

Concurrent with the energization of the starting motor the magnetic clutch OI is also energized, current being supplied to the primary winding I33 of the step-down'transformer I84 across the lines III and I82 and the current from the secondary winding I35 being rectified in the rectifier I88 before being delivered to the collector rings I83 and Ill of the coil 85 of the mag netic clutch. As soon as the magnetic clutch is energized its armature 98 is drawn into engagement with its core 93 against the resistance of the spring 91 and a friction drive is thereby provided between-the motor and the indicator shaft 38. Since the motor 80 is energized this motor drives the indicator shaft and the drive is such that the indicator hand III is driven in a counter-clockwise direction. As soon as the indicator hand I0 reaches its zero position the cam 82 on the indicator shaft lifts the movable contact 88 of the zero limit switch thereby breaking the circuit through the power line III, winding I28 of the delay relay I80, line I2I, valve limit switch I25 line I28, contacts 85 and 88 to the other side III] of the line, thereby causing the delay relay to open the circuit through the return motor 80 and the magnetic clutch SI and returning these parts to their normal inoperative condition, as shown in Fig. 2. The parts are therefore in their normal positions and ready for the repetition of the cycle.

It will also be observed that the stop switch I I8 provides a safety feature inasmuch as the operation of the meter can be stopped at will, at any time, by merely depressing this switch and the whole apparatus returned to its original normal condition including the return of the metering hand to its zero position. At the same time this switch also permits of manual control of the meter without altering the adjustment of the preselector hand.

It is obvious that various features of the inven tion are susceptible of modification. For example, in place of the rotatable pro-selector switch I8 and the fixed zero limit switch I, sliding cam switches could be employed. Such a modification is illustrated in Figs. 10 and Min which the hub II of the pres-elector worm wheel 12 is formed to provide an additional gear I88 which meshes with and drives a rack Ill. This rack is slidably moimted in a guideway I42 of a support I88 in the casing 88 and at its lower end carries a plate I of insulating material on which the fixed and movable contacts sllu and 8Id of '-a preselector switch are mounted, these contacts corresponding to the contacts 88 and U in the preferred form of the invention. The movable con-'- tactlla carries a cam projection which extends into the path of a second rack I88, this rack being also guided in a guideway I48 in the support I88 and being driven from the indicator. shaft 88. by a gear I". Also mounted on an insulating block I88 carried bythe support I88 are fixed and movable contacts 881: and 88a of a zero limit switch Ila, these contacts corresponding to the contacts 88 and 88 in the preferred construction and the movable contact 88 having a projection which 65:: and 66a in the same manner as the zero limit switch contacts 85 and 66 are closed in the preferred construction and thereafter open the preselector contacts 80a and 8 la in the same manner as the preselector switch contacts 60 and BI are opened in the preferred construction. Inasmuch as the adjustment of the preselector hand also adjusts the relative spacing ofthe preselector switch 18a and the zero limit switch 160 the amount of liquid delivered is regulated in the same manner as in the preferred construction.

Instead of employing the magnetic clutch 9| it is apparent that a one-way mechanical clutch Sla of the free wheeling type could be employed.

. In Figs. 12 and 13 is illustrated a freewheeling clutch in which the driving member I50 is secured to the motor shaft 62 and has an annular end pocket into which the driven member II fits, the

driven member being secured to the shaft 36. The driven member hasthe usual series of pockets I52,inner faces of which are arranged tangentially to the outer face of the driven member and thesepockets contain the rollers I53. When the indicator shaft 36 is being rotated so as to move the indicator 45 clockwise .no drive is established between the driven and driving members of the free wheeling clutch 6Ia because the rollers I53 are carried to thedeeper parts of thepockets I52 and become inoperative. As soon as the return motor 60 is energized the driving member I56 is rotated so that the rollers-roll outwardly and establish a drive between the driving and driven members whereby the return motor moves the indicator hand back to the zero .position. With this arrangement the indicator hand is moved continuously in a clockwise direction, that is, it is moved clockwise up to its point of registry with the preselector hand I6 and after pausing moves in the same direction back to its zero starting point. i

In Figs. 14, 15 and 16 is illustrated another modification of the means for adjusting the mechanism so as to stop the flow when a predetermined volume has been delivered. In this construction an arm I66 is fast to the indicator shaft 36, this arm having a removable pointed pin I6I projecting outwardly therefrom. The preselector adjusting. mechanism includes the shaft I4 and worm and worm wheel driving the hub II, as in the preferred construction and on the hub II is clamped an arm I62 having a pivot bolt I63 journalled at its outer end. Fixed to this pivot bolt is a wheel I64 which is weighted at one side, as

indicated at I65, so as to normally assume the.

position shown in Fig. 14.. This wheel has a peripheral belt-of rubber I66 and the wheel car-,

ries a mercoid switch I61 which is normally closed. The mercoid switch I61 has two contacts 80b and '8Ib which correspond to the contacts 80 and 8| occurring when the indicator arm 65 comes into, registry with the preselector arm 10. It is apparent'that this form of the invention will perform the same function as the preselector switch '|8 of the preferred form of the invention.

From the foregoing it is apparent that the presable mem thereof provide an extremely simple, compact, inexpensive and accurate meter in which the amount to' be delivered can be preselected and which will deliver the preselected'volume of the fluid and automatically restore the parts to their original normal condition. The meter is particularly adapted to handle hot materials, such as in the mixing or blending of asphalt, oil and the like. It will further be observed that the accuracy of the meter is insured by disconnecting all mechanism not imme("-tely concerned with the particular functioning of the mechanism at any particular time.

I claim as my invention:

1. In a fluid metering system of the character described, metering means, an electrically actuated valve for stopping the flow of liquid through said metering means, a shaft driven by said metering means, a freely rotatable member arranged concentric with said shaft, manual means for turning said rotatable member, a switch in circuit with said electrically operated valve and carried by said rotatable member and a cam carried by said shaft and actuating said switch when a pre- 2. In a fluid metering system of the character described, metering means, an electrically actuated valve for stopping the flow of fluid through said metering means, a calibrated member, an indicator shaft driven by said metering means, an indicator hand carried by said shaft and traversing said calibrated member and indicating the volume of fluid being delivered, a rotatable member on said shaft adjacent said hand the rotation of said rotatable member being independent of the rotation of said shaft, a.preselector hand carried by said rotatable member and traversing said calibrated member and adapted to be set to the calibration of the desired volume, manual means for turning said rotatable member and preselector hand to any position along said calibrated'member, a switch in circuit with said electrically actuated valve and carried by said rotatr and a cam on said shaft and actuating said switch when a predetermined relation obtains between said shaft and rotatable member.

3. In a fluid metering system of the character described, metering means, an electrically actuated valve for stopping the-flow of fluid through said metering means, a shaft driven by said metering means, a freely rotatable member arranged concentric with said shaft, manual means for turning said freely rotatable member, a weighted member plvotally secured to said freely rotatable member and normally held'in an upright position by its weight, a mercury switch mounted on said weighted member and arranged in circuit with said electrically actuated valve and means carried by said shaft for unbalancing said weighted member when a predetermined relation obtains between said shaft and said freely rotatable member.

4. In a fluid metering system of the character described, metering means, an electrically actuated valve for stopping the flow of fluid through said metering means, a calibrated member, an indicator shaft concentric. withjsaid member and driven by said metering means, an indicator hand carried by said shaft and traversing said calibrated member, a freely rotatable member on said shaft adjacent said hand, a preselector handcarried by said rotatable member and traversing said calibrated member; manual means for turning said rotatable member and preselector hand to any position along said dial, an arm can'ied by ated valve for stopping the flow of fluid throughsaid metering means, a shaft driven by said metering means, a pinion carried by said shaft,

, a rack driven by said pinion, a freely rotatable member arranged concentric with said shaft, manual means for turning said freely rotatable member, a pinion carried by said freely rotatable member, arack driven by said .last pinion, and cooperating trip and switch means carried .by said racks to actuate said valve when a predetermined relation obtains between said shaft and freely rotatable member.

6. In a fluid metering system of the character described, metering means, an electrically actuated valve for stopping the flow of fluid through said metering means, a calibrated member, an indicator shaft driven by said metering means, an indicator hand carried by said shaft and traversing said calibrated member, a freely rotatable member on said shaft adjacent said hand. a preselector hand carried by said rotatable member and traversing said calibrated member, manual means for turning said rotatable member and preselector hand to any position along said calibrated member, a pinion carried by said shaft, a rock driven by said pinion, a second pinion carried by said freely rotatable member, a second rack driven by said second pinion, a switch carried by one of said racks and in circuit with said electrically actuated valve and a trip carried by the other rack and actuating saidswitch when a predetermined relation obtains between said shaft and freely rotatable member.

7. In a fluid metering system of the character described, metering means, an electrically actuated valve for stopping the flow of fluid through said metering means, a switch in circuit with said electrically, actuated valve, a calibrated memher, an indicator shaft, means for driving said indicator shaft from said metering means, an indicator hand driven by said shaft and traversing said calibrated member and indicating the volume of fluid being delivered, a rotatable member arranged concentric with said shaft, the rotation of said rotatable member being independent of the rotation of said shaft. A preselector hand connected with said rotatable member and traversing said calibrated member and adapted to be set to the calibration of the desired volume, manual means for turning said preselector hand and rotatable member to any D sltion along said calibrated member, cooperating means carried by said rotatable member and shaft and operating to be actuated by said shaft when said hands come into register, an indicator hand return motor, a clutch between said motor and shaft and means actuated by the said cooperating means for simultaneously energizing said actor and closing said clutch when said valve 8. In a fluid metering system of the character described, metering means, an electrically actuated valve for stopping the flow of fluid through said metering means, a switch in circuit with said electrically actuated valve, a calibrated member,

an indicator shaft, means for driving said indicator shaft from said metering means, an indicator fluid being delivered, a rotatable member arranged concentric with said shaft the rotation of said rotatable member being independent of the rotation of said shaft, a preseiector hand connected with said rotatable member and traversing said calibrated member and adapted to be set to the calibration of the desired volume, manual means for turning said pres'elector hand-and rotatable member to any position along said calibrated member, cooperating means carried by said rotatable member and shaft and operating to be actuated by said shaft when said hands comeinto register, an indicator hand return motor, a clutch between said motor and shaft, means actuated by the said cooperating means for simultaneously energizing said motor and closing said clutch when said valve cldses, and means actu-- I I ated by said shaft fordeenergizlng said motor and opening said clutch when said indicator hand reaches a zero position on said calibrated member.

9. In a fluid metering system of the character described, metering means, an electrically actuated valve for stopping the flow of fluid through said metering means, a switch in circuit with said electricallyactuated valve, a shaft driven by said metering means, a rotatable member arranged concentric with said shaft the rotation of said rotatable member being independent of the rotation of said shaft, manual means for turning shaft for opening said last switch and deenergizing said motor when said shaft is returned to its original position. I

10. In a fluid metering system of the character described, metering means,,an electrically actuated valve for stopping the flow of fluid through said metering means, a switch in circuit withsaid electrically actuated valve, a shaft driven by said metering means, a rotatable member arranged concentric with said shaft the rotation of said rotatable member being independent of the rotation of said shaft, manual means for turning said rotatable member, cooperating means, carried by said rotatable member and shaft and operating to actuate said switch when a predetermined relation obtains between said shaft and said rotatable member, a motor for returning said shaft to its original position, an electromagnetic clutch between said motor and shaft and closing when energized, a switch actuated by said cooperating means for energizing said motor and clutch when said valve closes, a switch in series with said last named switch for deenergizing said motorand clutch and means actuated by said shaft for opening said last switch and deenergizing said motor and clutch when said shaft is returned to its original position.

11. In a fluid metering system of the character- I described, metering means, an electrically actu- 7 ated valve for stopping the flow of fluid through said metering means, a switch in circuit with said electrically actuated valve, a shaft driven by said metering means, a rotatable member arranged concentric with said shaft the rotation of said rotatable member being independent'of the rotation of said shaft, manual means for turning said rotatable member, cooperating means carried by said rotatable member and shaft and operating to actuate said switch when a predetermined relation obtains between said shaft and' said rotatable member, a motor for returning said shaft to its original position, a one-way clutch between said motor and shaft, said shaft closing when said motor is energized, a switch actuated by said-cooperating means for energizing said motor when said valve closes, a switch in series with said last named switch for deenergizing said motor and means actuated by said shaft for opening said last switch and deenergizing said motor when said shaft is returned to its original position.

12. In a fluid metering system of the character described, metering means, an electrically actuated valve operating, when energized, to start the flow of fluid through said metering means, start switch means in circuit with said electrically actuated valve and closing the circuit therethrough, a preselector switch in series with said start switch means and opening the circuit through said valve when opened, a shaft driven by said metering means, a rotatable member arranged concentric with said shaft the rotation of said rotatable member being independent of the rotation of said shaft, manual means for turning said rotatable member, cooperating means carried by said rotatable member and shaft and operating to open said preselector switch when predetermined relation obtains between said shaft and said rotatable member, a motor for returning said shaft to its original position, a clutch between said motor and shaft, a valve limit switch actuated by said valve for energizing said motor and closing said clutch when said valve closes, a zero limit switch in series with said valve limit switch and opening to break the circuit through said motor and means actuated by said shaft for opening said zero limit switch when said shaft returns to its zero position.

13. In a fluid metering system of the character described, metering means, an electrically actuated valve operating, when energized, to start the flow of fluid through said metering means, a start switch means in circuit with said electrically actuated valve and closing the circuit therethrough, a preselector switch in series with said start switch means and, when opened, opening the circuit through said valve, a shaft driven by said metering means, a rotatable member arranged concentric with said shaft the rotation of said rotatable member being independent of the rotation of said shaft, manual means for turning said rotatable member, cooperating means carried by said rotatable member and shaft and operating to open said preselector switch when a predetermined relation obtains between said rotatable member and shaft, a motor for returning said shaft to its original position, a clutch between said motor and shaft, a valve limit switch in circuit with said motor and opened by the opening movement of said valve and vice-versa, a zero limit switch in series with said valve limit switch and opening to break the circuit through said motor and valve limit switch and cam means on said shaft for closing and opening said preselector and zero limit switches, said cam opening said preselector switch when the predetermined relation obtains between said shaft and rotatable member and opening said zero limit switch when said shaft is returned to its zero setting.

14. In a fluid metering system of the character described, metering means, an electrically actuated valve for stopping the flow of liquid through said metering means, a shaft driven by said metering means, a carrier movably arranged adjacent said shaft, a switch mounted on said carrier and in circuit with said electrically operated valve, a cam carried by said shaft and movable into the path of said switch to open and close the same and means for moving said carrier to different positions with respect to the cam thereby to adjust the relation between the operation of said metering means and the operation of said 'SWitCh.

E. HAROLD BRAYER. 

